Shutter-worker



(No ModelL) (3.15. NICKERSON 8: L. M. FLEET.

SHUTTER WORKER.

Patented Oct. 25, 1892.

Z70 UED/7QZT07/FS' War/T2661? Mensa/M ii? UNITED STATES PATENT OFFICE.

CHARLES F. NIOKERSON, OF READING, AND LINDLEY M. FLEET, OF BOSTON, MASSACHUSETTS.

SHUTTER-WORKER.

SPECIFICATION forming part of Letters Patent No. 484,972, dated October 25, 1892.

Application filed September 1, 1891. Serial No. 404,396. (No model.)

To all whom it may concern..- the wall of the building 13, and having its in- Be it known that we, CHARLES F. NIOKER- ner end inside the wall preferablymade square SON, of Reading, county of Middlesex, and or other than round to receive the handle-le- LINDLEY M. FLEET, of Boston, county of Sufver 6, provided with an operating-handle e 55 folk, State of Massachusetts, have invented and havingits outer end beveled at e on either an Improvement in Blind or Shutter Operatside of the central recess a (See Fig. 6.) The ing Devices, of which the following descripsupporting-frame f, which is secured to the mom, in connection with the accompanying interior wall of the building to serve as a supdrawings, is a specification, like letters on the port for the inner end of the shaft (1 has piv- 60 to drawings representing like parts. oted to it the two pawls f f, so arranged that This invention has for its object to proone or the other of them will drop into the revide an improved device for operating outcess 6 whenever the lever e is moved into a side blinds or shutters from the interior of a vertical position to hold the said lever and building. the blind or shutter in position. The blind 65 In accordance with this invention the blind is represented in Fig. 1 as closed, it being held or shutter is fitted with a curved rack, which closed by the latch f dropped into the recess is in mesh with and operated by a toothed sec- 6 in the lever 6. By lifting the latch and tor or wheel, the shaft of which is extended grasping the handle 6' the shaft d and its through the wall of the building to the intesector 01 may be rotated to the right, Fig. 1, 7o rior, where it is fitted with suitable operating and will act through the rack c to swing the and retaining devices. blind into its open position back against the One part of this invention therefore consists building, one of the inclined faces 6 on the in the combination, with a blind or shutter lever e depressing the pawl f as itapproaches hinged to a wall and a curved rack attached and permitting the pawl to spring into the 75 to the inner edge of said blind, of a toothed recess 6 and hold the lever and blind in its sector mounted on a shaft journaled in said open position. The blind may be again closed wall, the pitch-line of the teeth of said sector from the inside by depressing the pawl f and and rack extending farther from said wall at rotating the shaft d back to its former posione point than another, substantially as will tion. The pivotal point of the hinge of a 80 be described. blind or shutter, being as a rule offset .from Other features of this invention will be the blind itself, (see Fig. 3,) causes the inner pointed out in the claims at the end of the or rear edge of the blind to describe a circle specification. bodily about the pivotal center of the hinge,

Figure 1 represents in front elevation a the radius of the circle being the distance 85 blind or shutter fitted with my improved op- (five to six) from the pivotal center of the crating device; Fig.2, a right-hand end view hinge to the blind, so that as the blind is of Fig. 1; Fig. 3, a cross-section taken on the swung from its closed position, Fig. 1, to its dotted line m m, Fig. 1; Figs. 4 and 5, details open position against the wall of the building showing the rack and sector and the supportthe rack c, if bent on a true curve, would swing o ing-plate. Fig.6shows the operating-leverdeawa from and out of engagement with the tached; Fig. 7,a modification to be described. sector. To obviate this the sector is thick- Referring to the drawings,Arepresents any ened at 7 intermediate its ends, a portion of usual blind or shutter mounted upon suit-able its teeth at this point extending to a greater hinges a, fixed to the wall or finish of the distance from the building than others, so that 5 house or building B. The blind or shutterA the longer teeth of the sector will come into at some convenient point has secured to its play as the blind swings away from the buildrear or inner edge a curved rack c, the teeth ing in turning, thus keeping the teeth of the 0 of which, as herein shown, are directed sector and rack always in mesh. In other downwardly to mesh with the peripheral teeth words, the pitch-line of the teeth of the rack [00 d on the sector 01, fixed to the outer end of and sector is inclined with relation to the seethe shaft dijournaled in. suitable bearings in tor-shaft or to the wall of the building. The

ends of the sector are made thin to permit the blind to swing up close to the building, as shown in Fig. 3, when either fully open or closed without necessitating the cutting away of the material of the blind to make room for the sector.

As herein shown, the rack c is made ellip tie in form, so that it will extend farther away from the blind when the same is in an intermediate position farthest from the wall of the building and from the sector to also assist in keeping the two in mesh with each other.

While we have herein shown the rack as elliptic in form and the sector as formed so that some of the teeth extend farther from the wall than others, it is evident that the elliptic rack may be employed with a plain sector, as shown in Fig. 7, or the sector of varying thickness may be employed with a rack curved on a true circle. In lieu of the sector placed square with the shaft (1 and made thicker in some portions than others a toothed sector of uniform thickness, but placed on the shaft at an angle, may be employed, the teeth in such a construction being carried farther from the wall at some points than at others,

owing to the angularity, or substantially in the pitch-line, and we desire it to be understood that while we only have shown and described a sector or portion of a wheel (I, still weconsider a complete wheel as a full equivalent and as included in this invention.

The support f is preferably formed with legs f at its ends, so that the support may be easily applied to finish having an irregular surface, the legs being inserted into the material or out 01f to fit the varying surface of the finish to which it is applied, the support being held in place by screws 10.

This invention is not limited to the particu- 4o lar construction herein shown.

We claim" 1. A wall, a blind hinged thereto, and a curved rack attached to the inner edge of said blind, combined with a toothed sector mounted on a shaft journaled in said wall, the pitchline of the teeth of said sector and rack extending farther from said wall at one point than another, substantially as and for the purpose set forth. 5o

2. The combination, with a shaft extended through the wall of a building and a blind operated thereby, of a support f for the inner end of. said shaft, having legs f substantially as described.

3. The combination, with a shaft extended through the wall of a building and a "blind operated thereby, of a support for the inner end of said shaft, the lever c, inclined faces e recess e and pawls f and f substantially as described.

4. A wall, a blind hinged thereto, and a curved rack attached to the inner edge of said blind, combined with a toothed sector mounted on a shaft journaled in said wall, the said sector at one side of its centerbeing'thinued and thereby made wedge-shaped toperrnit the blind to swing close against the wall without removing any of the material of the blind, substantially as described.

In testimony whereof We havesign-ed our names to this specification in the presence of two subscribing witnesses.

CHARLES F. NIOKERSON. LINDLEY M. FLEET. Witnesses:

FREDERICK L. EMERY, AUGUSTA E. DEAN. 

